Effect of Parasitic Elements on Non-inverting Buck-Boost Converter Used in PV System

In the proposed study, MOSFET device used in non-inverting buck-boost converter for photovoltaic (PV) system is analyzed. The parameters R _ds(on) are varied and the output of buck-boost converter is observed. The inductor and capacitor are used as filter elements in the converter. The parasitic resistance of these filter elements are varied and the performance of the converter is analyzed. From the study, the variation of parasitic element of capacitor will not much disturb the output voltage, whereas the variation of parasitic element of inductor will disturb the output voltage and has significant contribution on the output voltage of converter. Also, the proposed study gives better insight into parasitic effect of printed circuit board and losses incurred due to the same. In PV systems buck-boost converter is used to convert solar energy to electrical energy which is then stored in battery to drive the loads. These parasitic elements will have considerable effect on the performance of converter used in solar power system.